The amount of points to stay at a new resort.
For a 2 bedroom magic season, OKW is 296. SSR went to 316. AKV is 360 for the very good good view. If points did not change, then ever magic season would be 296 for a 2 bedroom.
When people talk about the points "not changing", they are referring to the points at a particular resort, not from one resort to the next. In other words, the points to stay in a 2BR in Magic season at Resort X will not change over the lifetime of the resort. The points to stay in a 2BR at Resort Y might be higher or lower, but also won't change over time. (In actual fact,
DVC could make changes to the
point chart for any resort, but if the raise the points in one area, they have to lower them in another such that the total points for the entire resort do not change.)
To say that the points go up whenever a new resort is opened is actually not the case. You compared AKV to OKW and SSR, but you left out all the other resorts that opened in between OKW and SSR, all of which are higher than SSR except for the standard-view villas at BWV. Here are the points required for a 1-week stay in a 2BR in Magic season for all of the WDW DVC resorts, in the order in which the resorts opened:
OKW 296
BWV 306 (standard-view), 350 (preferred)
VWL 350
BCV 350
SSR 316
AKV 256 (value), 283 (standard), 360 (savanna), 423 (concierge)
The savannah-view villas at AKV are about the same as BCV, VWL and BWV/Preferred which are the other hotel-based DVC resorts. So while the points to stay in a savannah-view 2BR at AKV are higher than a 2BR at SSR, the same is true of BCV, VWL and BWV/Preferred, all of which opened before SSR. And if you don't mind smaller accommodations, those value villas are a heck of a deal. If you want the larger villa, but don't care about the view, the standard villas are also less than OKW.